PTHH: \(2Fe+3Cl_2\underrightarrow{t^o}2FeCl_3\)
Áp dụng ĐLBTKL, ta có:
\(m_{Cl_2}=m_{FeCl_3}-m_{Fe}=16,25-5,6=10,65\left(g\right)\\ \rightarrow n_{Cl_2}=\dfrac{10,65}{71}=0,15\left(mol\right)\\ \rightarrow V_{Cl_2}=0,3.22,4=3,36\left(l\right)\\ \rightarrow B\)
`Fe + Cl_2 ->FeCl_2`
`0,1` `0,1` `(mol)`
`n_[Fe]=[5,6]/56=0,1(mol)`
`n_[FeCl_2]=[16,25]/127=65/508(mol)`
Ta có: `[0,1]/1 < [65/508]/1`
`=>Fe` hết, `FeCl_2` dư
`=>V_[Cl_2]=0,1.22,4=2,24(l)`
`->A`